马上打电话给医生——这是紧急情况。

Call the doctor immediately - it’s an ___emergency.

如遇紧急情况，请前往最近的出口。

In case of an ___emergency, please proceed to the nearest exit.

由于发动机故障，飞机不得不进行紧急迫降。

The plane had to make an ___emergency landing due to engine failure.